Temporarily disable 'Scan Always' mode

This change disables 'Scan Always' by ignoring the setting; and
hard coding value to 'false'. The UI will change based on whatever
is in settings; but underneath we won't enable scans when WiFi is
off.

Change-Id: Ibb1401207b6675e609e979ea23b63177814f762c

services/java/com/android/server/wifi/WifiController.java

@@ -379,6 +379,9 @@ class WifiController extends StateMachine {
 
         @Override
         public void enter() {
+
+            if (DBG) logd("Going to disabled without scan state");
+
             mWifiStateMachine.setSupplicantRunning(false);
             // Supplicant can't restart right away, so not the time we switched off
             mDisabledTimestamp = SystemClock.elapsedRealtime();
@@ -496,6 +499,9 @@ class WifiController extends StateMachine {
 
         @Override
         public void enter() {
+
+            if (DBG) logd("Enabling disabled with scan state");
+
             mWifiStateMachine.setSupplicantRunning(true);
             mWifiStateMachine.setOperationalMode(WifiStateMachine.SCAN_ONLY_WITH_WIFI_OFF_MODE);
             mWifiStateMachine.setDriverStart(true);

services/java/com/android/server/wifi/WifiSettingsStore.java

@@ -51,7 +51,7 @@ final class WifiSettingsStore {
         mContext = context;
         mAirplaneModeOn = getPersistedAirplaneModeOn();
         mPersistWifiState = getPersistedWifiState();
-        mScanAlwaysAvailable = getPersistedScanAlwaysAvailable();
+        mScanAlwaysAvailable = false; // getPersistedScanAlwaysAvailable();
     }
 
     synchronized boolean isWifiToggleEnabled() {
@@ -124,7 +124,8 @@ final class WifiSettingsStore {
     }
 
     synchronized void handleWifiScanAlwaysAvailableToggled() {
-        mScanAlwaysAvailable = getPersistedScanAlwaysAvailable();
+        // mScanAlwaysAvailable = getPersistedScanAlwaysAvailable();
+        mScanAlwaysAvailable = false;
     }
 
     void dump(FileDescriptor fd, PrintWriter pw, String[] args) {